The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 1992
Filed:
Oct. 18, 1990
Johannes A Van Broekhoven, Amsterdam, NL;
Leonardus Petrus, Amsterdam, NL;
Barend Mastenbroek, Amsterdam, NL;
Coenraad H Wilms, Klundert, NL;
Shell Oil Company, Houston, TX (US);
Abstract
An improved process for the production of linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon in the presence of a reaction diluent and a catalyst composition formed from a palladium compound, the anion of a strong non-hydrohalogenic acid and a bidentate ligand of phosphorus, nitrogen or sulfur comprises conducting a first polymerization to produce a prepolymer and completing the polymerization at a lower temperature in the presence of sufficient prepolymer to constitute a substantial proportion of the polymerization mixture.